diff --git a/lib/audiodev/AQS.cpp b/lib/audiodev/AQS.cpp
index 143972d..9a6f374 100644
--- a/lib/audiodev/AQS.cpp
+++ b/lib/audiodev/AQS.cpp
@@ -48,9 +48,13 @@ struct AQSAudioVoiceEngine : BaseAudioVoiceEngine
     std::condition_variable m_engineEnterCv;
     std::condition_variable m_engineLeaveCv;
     bool m_cbWaiting = false;
+    bool m_cbRunning = true;
 
     static void Callback(AQSAudioVoiceEngine* engine, AudioQueueRef inAQ, AudioQueueBufferRef inBuffer)
     {
+        if (!engine->m_cbRunning)
+            return;
+
         std::unique_lock<std::mutex> lk(engine->m_engineMutex);
         engine->m_cbWaiting = true;
         engine->m_engineEnterCv.wait(lk);
@@ -712,7 +716,10 @@ struct AQSAudioVoiceEngine : BaseAudioVoiceEngine
 
     ~AQSAudioVoiceEngine()
     {
-        AudioQueueDispose(m_queue, false);
+        m_cbRunning = false;
+        if (m_cbWaiting)
+            m_engineEnterCv.notify_one();
+        AudioQueueDispose(m_queue, true);
         if (m_midiClient)
             MIDIClientDispose(m_midiClient);
     }
diff --git a/lib/graphicsdev/Metal.mm b/lib/graphicsdev/Metal.mm
index e5e27e2..1d73004 100644
--- a/lib/graphicsdev/Metal.mm
+++ b/lib/graphicsdev/Metal.mm
@@ -467,7 +467,14 @@ static const MTLBlendFactor BLEND_FACTOR_TABLE[] =
     MTLBlendFactorSourceAlpha,
     MTLBlendFactorOneMinusSourceAlpha,
     MTLBlendFactorDestinationAlpha,
-    MTLBlendFactorOneMinusDestinationAlpha
+    MTLBlendFactorOneMinusDestinationAlpha,
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 101200
+    MTLBlendFactorSource1Color,
+    MTLBlendFactorOneMinusSource1Color,
+#else
+    MTLBlendFactorSourceColor,
+    MTLBlendFactorOneMinusSourceColor,
+#endif
 };
 
 static const MTLPrimitiveType PRIMITIVE_TABLE[] =
diff --git a/logvisor b/logvisor
index f913fb8..e6f24e6 160000
--- a/logvisor
+++ b/logvisor
@@ -1 +1 @@
-Subproject commit f913fb8479e14029aa510b01d620e64b17d4ad31
+Subproject commit e6f24e64284fff5d5559b3d7e5aa44b610e2d7e9